Turning over but won't fire?

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Oct 5, 2015 | 07:40 AM

mattsmith

Thread Starter

Newbie

Joined: Feb 2015

Posts: 18

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Year: 1996

Model: Cherokee

Engine: 4.0

Turning over but won't fire?

For a while, the jeep was bogging down, misfiring and had a really rough idle. Now it won't start at all.

Its turning over but wont fire. Pulled the plugs and I have a spark and fuel is definitely getting through.

Thought maybe crank position sensor, but would I have a spark if thing was out?

Thanks, Matt.

btw, 93' 2.5 4cyl 5 speed

Oct 5, 2015 | 07:44 AM

cruiser54

::CF Moderator::

Joined: Aug 2011

Posts: 43,971

Likes: 1,577

From: Prescott, Az

Year: 1990

Model: Cherokee (XJ)

Engine: 4.0

Crisp blue spark or yellowish spark?

Oct 5, 2015 | 08:01 AM

mattsmith

Thread Starter

Newbie

Joined: Feb 2015

Posts: 18

Likes: 0

Year: 1996

Model: Cherokee

Engine: 4.0

Quote:

Originally Posted by cruiser54

Crisp blue spark or yellowish spark?

yellowish

Oct 5, 2015 | 08:03 AM

cruiser54

::CF Moderator::

Joined: Aug 2011

Posts: 43,971

Likes: 1,577

From: Prescott, Az

Year: 1990

Model: Cherokee (XJ)

Engine: 4.0

Needs to be blue. Your coil may be taking a dive on you.

Last time you replaced cap, rotor, and wires?

Oct 5, 2015 | 08:10 AM

mattsmith

Thread Starter

Newbie

Joined: Feb 2015

Posts: 18

Likes: 0

Year: 1996

Model: Cherokee

Engine: 4.0

Quote:

Originally Posted by cruiser54

Needs to be blue. Your coil may be taking a dive on you.

Last time you replaced cap, rotor, and wires?

Only owned this jeep for just over a year. I haven't replaced the above in that time. Suppose its a good place to start. Could grounds be a possibility?